Addihg-machine



. T. T. STRODE.

Calculator.

No. 30,264. Patented Oct. 2.1860.

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UNITED STATES PATENT4 OFFICE.

THOMAS T. STRODE, OF MORTONVILLE, PENNSYLVANIA.

ADDING-MACHINE.

Specification of Letters Patent No. 80,264, dated October 2, 1860.

To all whom it may concern:

Be it known that I, THOMAS T. STRoDE, of Mortonville, in the county ofChester and State of Pennsylvania, have invented a new and ImprovedMachine for Adding Numbers; and I do hereby declare thatl the tollowingis a full, clear, and exact description of the same, reference being hadto the accompanying drawing, forming a part of this specication, inwhich- Figure l, represents a plan or top view of my invention asapplied to an accountbook.` Fig. 2, is a sectional front elevation ofthe same.

Similar letters of reference in both views indicate corresponding parts.

The object ot' this invention is to produce a simple cheap and reliabledevice for adding numbers, that can be carried in the pocket withconvenience and used in the field or on a wharf or in any place where itmay be desirable to have on hand a machine for adding numbers, or whichcan be used in combination with a platform itting on an account book sothat the several rows of figures on said account book can be added upconveniently and with little trouble.

My invention consists, first, in the combination with the registeringapparatus ot a platform provided on one end with a stationary guidestrip and on the other with an adjustable slide so that it can beconveniently adjusted to the size of the account book with which it isto be used; second, in the arrangement of a notched slide in combinationwith the platform and with the registering apparatus so that byadjustino` said slide the row of figures to be adder is kept before theeyes ot the accountant.

To enable those skilled in the art to make and use my invention I willproceed to describe its construction and operation with reference to thedrawing.

The registering apparatus A, consists orn tour or more wheels a, Z), c,d, which are arranged in the interior of a case B. The face plate ofthis case is provided with a series of annular slots a', c', d, equal innumber to the number of the wheels and with their outside diametersequal to the diameters of the wheels. The circular plates e, f, g, 7L,which form the centers of these annular slots, connect with the mainportion of the face plate by narrow strips z', 7a,

Z, m, and each of these circular plates is marked on its face withigures from 0 to 9 and each of the wheels is provided with ten holes n,n', in its face and drilled in circles, which coincide with the middleof the annular slots a, o, c, d', as clearly shown in Fig. l.

It a pin is inserted into one of the holes n, for instance in the holeopposite the ligure T, on the circular plate e, the wheel a, can beturned in the direction ot the arrow narked on its face, until the pinby striking the connecting strip lz', stops the progress otl the wheel.In the same manner each of the other wheels can be turned in thedirection of the respective arrows marked on each of the wheels in Fig.l, spring dogs 0, being' provided to prevent the wheels turning in thewrong direction. One of the holes f/t, on the face of each wheelrepresents the naught and it is distinguished by a circle around it orby any other appropriate mark. Each of the wheels c, Z), c, d, isprovided with ten teeth and a carrying tooth on each of the wheels (Z,c, and Y), produces for each complete revolution ot one ot these wheelsof the nest preceding wheel that is to say; one complete revolution ofthe wheel produces 5 of a revolution ot the wheel a, and the completerevolution of the wheel C, produces l of a revolution of the wheel andso on; in short the whee (Z, represents the unit wheel of theregistering apparatus the wheels e, gives the tens the wheel 7), thehundreds and the wheel a, the thousands and so forth, Each of the wheelsa, Z), c, d, is also marked on its periphery with lig-lires from O to 9,said figures being placed at equal distances, one from the other andopposite to apertures j), Q, fr, s, in the front side ot the case (seeFig. 2,) and the position ot' these figures in regard to the aperturesis such, that it the hole yn', which indicates the naught on the tace ofone ot the wheels be placed opposite the naught on the appertainingcircular plate the naught on the periphery ot' the said wheel is exactlyopposite to the appertaining aperture in the iront side of the case andit the wheel is now turned by inserting a pin in the hole opposite toone of the figures say the figure 4C on the appertaining circular plateuntil said hole comes opposite the naught on the plate, the ligure 4 onthe periphery of the wheel will appear opposite the appertainingaperture in the back of the case.V 1f it is now desired, to add togetherthe figures 7 and 5, the apparatus is first adjusted so that all theholes n, are opposite the naughts on the circular plates and a pin isnow inserted into the hole opposite the figure 7, in the face of thewheel CZ, and the wheel is turned in the direction of the arrow markedon said wheel in Fio. l until its progress is arrested by the pinstriking against the connecting strip m; the pin is now inserted intothe hole opposite the figure 5, and the wheel is turned again until thepin comes in contact with the connecting strip m, and the figure 1, willnow appear opposite the aperture r, and the figure 2, opposite theaperture s, in the back of the case thus registering the correct sum.

With numbers containing tens or hundreds or thousands or with stilllarger numbers it is desirable to commence the operation on the lefthand column and the figures of each column are added up by turning theappropriate wheel in the proper direction as above described and afterall the columns have been thus added, the correct amount can beascertained by looking at the figures exhibited through the apertures p,g, 1^, s, in the front side of the case. 1f the operation is commencedon the right hand column, and one of the wheels for instance the unitwheel d, should be left standing with the figure 9 opposite theappertaining aperture s, in the front side of the case, the motion ofthe next, or tens wheel c, will disturb the position of the preceding orunit wheel and the result will be incorrect.

In order to render the use of this registering apparatus, or addingmachine convenient with account books, a platform C, is combined withthe case B. The front edge of this platform forms the guide for a slideD, which is constructed of a strip of sheet metal bent twice at rightangles and kept in its place by a strip of wood t, that is secured tothe edge of the platform as clearly shown in the drawing. One portion D,of the slide is on a level and in the same plane, or nearly so with thelower surface of the platform, C, and another portion D, of the sliderests on the upper surface of the platform, being provided with a handlewhich serves to move the slide to the desired place.

The platform C, is adjusted to the account book with which the addingmachine is to be used by means of two V-shaped guide strips E, E', thestrip E being permanently attached to the under surface of the platformand t-he strip E', being adjustable on the same by means of a set screwo. One of the strips is intended to slide on the edge of the accountbook and the other in the middle, as clearly shown in the drawing and anotch u, -in the front edge of the slide D, serves to adjust the latterto the column or row of figures to be added.

The case B, of the registering apparatus is provided with two flangesfw, one on each side to fit into notches in the sides of a recess F, inthe platform C, so that said case can be moved in and out and that thewheel corresponding to a certain column of figures may be broughtopposite to or in line with said column. This operation is facilitatedby vertical lines drawn on the front side of the case and correspondingwith the centers of the several wheels and by a line on the upper partD, of the slide D, which stands opposite to the center of the notch u.If it is now desired to add up a series of figures in an account book,the platform O, is adjusted on the desired page of the book bymeans ofthe guide strips E,E,and the slide D, is moved so as to bring the notchu, opposite the first or left hand column of iigures and if this columnrepresentsthe thousands the case B, is adjusted in the platform so thatthe wheel a, comes opposite to said column. One figure after the otherof this column is now added by turning the wheel a, by means of asuitable pin as above described, and the several figures in the columnare brought before the eyes of the operator one after the other bymoving the platform C, down or up on the book from one figure to theother. When the first column is nished the notch u, is brought over thesecond col- I umn and the case B, is adjusted so that the wheel `7J,comes opposite to this column and to the notch and the second column isnow added up in the same manner by operating the wheel and so forth withthe third and fourth columns, until the whole series of gures has beenadded up. The result is ascertained by looking at the apertures p, g, r,s, in the front side of the case.

By the application of the notched slide D, each ligure is kept beforethe eyes of the accountant, until by the operation of the proper wheelit has been added, and by giving to the case B, a longitudinal motion inthe platform, each wheel can be brought opposite to the column offigures to be added, whereby the operation is greatly facilitated.

This machine is very simple and convenient: the registering apparatuscan be used with equal facility independently of the platform when it isdesired to register a quantity of lumber or a quantity of grain or ofany other article, or it can be used with great advantage andconvenience in combination with the platform for the purpose of addingup the numbers in an account book.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. The combination of the registering apparatus A, With the platform C,and V- tially in the manner and for the purpose shaped guide strips E,E, constructed and herein set forth. operating substantially as and forthe purposa described THOMAS T. STRODE.

2. The arrangement of the notched slide /Vitnesses: D, in combinationwith the registering appa- SAMUEL GREENWOOD,

ratus A, constructed and operating snbstan- JACKSON SWEETEN.

